*{
	margin: 0 ;
	border: none;
	padding: 0;
}
body{
	background: lightcoral;
}
#cans{
	position: relative;
	margin: 0 auto;
	margin-top: 5vh;
	height: 500px;
	width: 700px;
}
#video{
	/*height: 80vh;*/
	float: left;
	background: black;
	position: relative;   /*去掉这句将会使得video优先级失效*/
	z-index: 99;
}

aside{
	float: left;
	height: 500px;
	width: 200px;
	overflow: auto;
	background: black;
	opacity: 0.9;
	position: relative;
}
aside header h4{
	color: white;
	margin-bottom: 20px;
	margin-top: 5px;
	text-align: center;
}
aside ul{
	background: black;
	width: 10vw;
	list-style: none;
	text-align: center;
}
aside ul li{
	color: white;
	font-size: 14px;
	line-height:30px ;
}

aside ul li:hover{
	
	background-color: lightgray;
	color: lightcoral;
	font-weight: bold;
}

aside #playList-hidden {
	position: absolute;
	bottom: 250px;
	right: 0;
	width:20px ;
	height: 32px;
	background: lightgoldenrodyellow;
	font-size: 16px;
	font-weight: bold;
	border-top-left-radius:10px ;
	border-bottom-left-radius:10px ;
	opacity: 0.5;
	z-index: 10000;
}

#cans #playList-show1{
	margin-top: 230px;
	width:20px ;
	height: 32px;
	background:lightgoldenrodyellow;
	font-size: 16px;
	font-weight: bold;
	border-top-right-radius:10px ;
	border-bottom-right-radius:10px ;
	opacity: 1;
	visibility: hidden;
}

#cans #playList-show1:hover,aside #playList-hidden:hover{
	opacity: 0.7;
}
.select{
	color: lightcoral;
}

/*aside #playList-show{
	position: absolute;
	bottom: 250px;
	left: 0;
	width:20px ;
	height: 32px;
	background: lightgoldenrodyellow;
	font-size: 16px;
	font-weight: bold;
	border-top-left-radius:10px ;
	border-bottom-left-radius:10px ;
	opacity: 0.5;
	z-index: 1000;/*这里是第一优先级，为什么没显示在视频上方
	transform:translateX(-20px) ;
	display: block;
}*/